html,body,#app{
  width:100%;
  height:100%;
  padding: 0;
  margin: 0;
}
//强制换行
.text_wrap{
  word-wrap:break-word;
  word-break:break-all;
}
// 强制不换行，超出省略号
.text_nowrap{
  overflow: hidden;
  text-overflow:ellipsis;
  white-space: nowrap;
}
// 文本左右对齐
.text_justify{
  display: inline-block;
  text-align: justify;
  text-align-last: justify;
}
// 居中
.flex_center{
  display: flex;
  align-items: center;
  justify-content: center;
}
// 垂直对齐
.flex_vertical{
  display: flex;
  flex-direction: column;
  justify-content: center;
}
// 垂直居中
.flex_align_center{
  display: flex;
  align-items: center;
}
